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Uncategorized

Song of Myself, 51

Do I contradict myself?

Very well then I contradict myself,

(I am large, I contain multitudes.)

Walt Whitman – 1819-1892
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Uncategorized

Sorry Mark

It’s still not available.

Categories
FYI

Windows 10 and Broadcom Bluetooth 3.0

Apparently during the upgrade Windows 10 installs the Broadcom Bluetooth 3.0 USB, which is incorrect for the Logitech mini-transmitter and will not start.

First, download and install the latest version of SetPoint from Logitech [6.67.82_64]. Then under Device Manager uninstall the Broadcom Bluetooth 3.0 USB. Unplug the Logitech dongle, if not done already. Then, with SetPoint opened, plug the dongle back in to an available USB port.

From docstork via https://forums.logitech.com/t5/Keyboards-and-Keyboard-Mice/Windows-10-and-Broadcom-Bluetooth-3-0/m-p/1428404/highlight/true#M56703

Categories
FYI

Fundamentals of AM and FM Radio

Categories
Uncategorized

Blinking red light on furnace

The codes are usually explained on a wiring diagram that is on the back panel.

Check yours, it might be different!  For me, a continuously blinking light is normal.

  • Flashing slow: Normal – no call for heat
  • Flashing fast: Normal – call for heat
  • Continuous on: Replace IFC (circuit board)
  • Continuous off: Check power
  • 2 Flashes: External lockout (retries or recycles exceeded)
  • 3 Flashes: Pressure switch error
  • 4 Flashes: Open limit device
  • 5 Flashes: Flame sensed when no flame should be present
  • 6 Flashes: 115 VAC power reversed polarity or poor grounding
  • 7 Flashes: Gas valve circuit error
  • 8 Flashes: Low flame sense signal
  • 9 Flashes: Check igniter

FYI, for a modern furnace, Never attempt to light your furnace manually.  It likely uses a direct ignition system so when power is cycled, the pilot will then ignite automatically.  It’s better to just call your gas company if there was an outage.

Categories
FYI Networking

Stream Songs From Phone to Computer

There are many apps to stream from computer to phone (AirStream: Stream PC over Air or SoundWire) but I want to listen to a podcast or music using my Android phone but listening on my computer or  headset.  It’s a good thing you can  play the song wirelessly using Bluetooth on both the devices.

  1. Install Microsoft Windows Mobile Device Center.
  2. Turn on Bluetooth on the computer and the phone then  each of them visible.
  3. Right-click on the Bluetooth icon in the Windows system tray and select the option Add a device
  4. Pair your phone and your computer with each other.
  5. Right-click on the Bluetooth   icon in the system tray again but now select Show Bluetooth Devices.
  6. Right-click on your paired phone and click on the Bluetooth Operations.
    1. (If A2DP support is available on the phone, it will show an option to Play Music under Audio and Video operation.)
  7. Click on the link to activate.
  8. You should now have a player control will appear on your taskbar (If not, try and right-click on the taskbar and select Bluetooth Remote Control under the Toolbars)

If you run into a problem, check this out.

Categories
FYI

How An Engine Works

engine

via http://jalopnik.com/this-animated-how-an-engine-works-infographic-is-just-g-1333595474

Categories
FYI

Garbage Disposal Stuck Flywheel

A humming sound coming from your garbage disposal?  It’s could be  a Stuck Flywheel.  Use the 1/4” Allen wrench (hex key) that came with Garbage Disposal and twist back and forth a few times.

Categories
Telecommunications

Registered Jack

In the mid 1960’s the Bell System companies used the 505A plug, a round connector with four prongs.  We’ve moved to the de facto standard of Registered Jacks.

Common Registered Jacks

Code Connector Usage
RJ2MB 50-pin micro ribbon 2–12 telephone lines with make-busy arrangement
RJ11(C/W) 6P2C For one telephone line (6P4C if power on second pair)
RJ12(C/W) 6P6C For one telephone line ahead of the key system
RJ13(C/W) 6P4C For one telephone line behind the key system
RJ14(C/W) 6P4C For two telephone lines (6P6C if power on third pair)
RJ15C 3-pin weatherproof For one telephone line
RJ18(C/W) 6P6C For one telephone line with make-busy arrangement
RJ21X 50-pin micro ribbon For up to 25 lines
RJ25(C/W) 6P6C For three telephone lines
RJ26X 50-pin micro ribbon For multiple data lines, universal
RJ27X 50-pin micro ribbon For multiple data lines, programmed
RJ31X 8P4C Allows an alarm system to seize the telephone line to make an outgoing call during an alarm. Jack is placed ahead of all other equipment. (Only 4 conductors are used)
RJ38X 8P4C Similar to RJ31X, with continuity circuit. If the plug is disconnected from the jack shorting bars allows the phone circuit to continue to the site phones. (Only 4 conductors are used)
RJ41S 8P8C, keyed For one data line, universal (fixed loop loss and programmed)
RJ45S 8P8C, keyed For one data line, with programming resistor
RJ48C 8P4C For four-wire data line (DSX-1)
RJ48S 8P4C, keyed For four-wire data line (DDS)
RJ48X 8P4C with shorting bar For four-wire data line (DS1)
RJ49C 8P8C For ISDN BRI via NT1
RJ61X 8P8C For four telephone lines
RJ71C 50-pin micro ribbon 12 line series connection using 50-pin connector (with bridging adapter) ahead of customer equipment. Mostly used for call sequencer equipment.

Many of the basic names have suffixes that indicate subtypes:

  • C: flush-mount or surface mount
  • F: flex-mount
  • W: wall-mount
  • L: lamp-mount
  • S: single-line
  • M: multi-line
  • X: complex jack

T1 Termination

The RJ48C is used for T1 service.
The RJ48C is used for T1 service.

An RJ-48 plug is often mistaken for RJ-45. On the outside, the two look identical—both are housed in miniature 8-position jacks. The difference is in the wire pairing. RJ-48 connectorIn RJ-48, two of the wires are for transmit, two are for receive, and two are for the drain. The last two wires are reserved for future use

 

An RJ48X is wired like an RJ48C but shorting bars are added so when nothing is plugged into the jack, the shorting bars loop back the line toward the far end (pin 1 shorts to pin 4 and pin 2 shorts to pin 5.)
An RJ48X is wired like an RJ48C but shorting bars are added so when nothing is plugged into the jack, the shorting bars loop back the line toward the far end (pin 1 shorts to pin 4 and pin 2 shorts to pin 5.)

 

Three subsets

There are three subsets within RJ-48: RJ-48C, RJ-48X, and RJ-48S. RJ-48C and RJ-48X are very similar, though RJ-48C is more common. Both use lines 1, 2, 4, and 5, and connect T1 lines. RJ-48X connectors, however, have shorting bars. RJ-48S uses lines 1, 2, 7, and 8, and generally connects 56K DDS lines.

Here’s how RJ-48C pinning compares to RJ-48S pinning:

Pin RJ-48C RJ-48S
1 Receive ring Receive data +
2 Receive tip Receive data –
3 No connection No connection
4 Transmit ring No connection
5 Transmit tip No connection
6 No connection No connection
7 No connection Transmit data +
8 No connection Transmit data –

(*T568B is equivalent to AT&T 258A so for reasons of tradition, it’s likely the wire scheme the telco is going to drop off)

 

DS0 / DDS Termination

An RJ48S is used for subrate data services or a 56K DS0.
An RJ48S is used for subrate data services or a 56K DS0.

Categories
Telecommunications

DMARC / Network Interface Devices

The demarcation point (DMARC) is the point at which the public switched telephone network (PSTN)ends and connects with the customer’s on-premises wiring (called Inside Wire or IW.)  Don’t confuse this with a NIU, it’s the same but different.

For residential locations you might have started off with an old Western Electric Company (WECO) lightning protector:

Lightning Protector
Used around 1915. The phone company line from the pole connected at the top binding posts marked “L” for “Line”, the house wiring connected to “I” for “Inside” and G for Ground. In later years the Bell System added copper straps that bypassed the fuses… unsure why.

The Western Electric Type 58A Protector, circa 1900, protects against lightning and other high voltages.
The Western Electric Type 58A Protector, circa 1900, protects against lightning and other high voltages.

 

After that they went to the carbon and porcelain blocks which were much smaller:

The carbon and porcelain block! In the presence of high voltage, the carbon blocks under the pressure of the spring would be moved to earth after the restraining glue melted. The whole thing had to be replaced.
The carbon and porcelain block! In the presence of high voltage, the carbon blocks under the pressure of the spring would be moved to earth after the restraining glue melted. The whole thing had to be replaced.

In the 1980s, Ma Bell started using a gas-filled protector. In the presence of high voltage, the gas ionizes and provides a path to earth (ground). When the voltage is removed, the protector returns to its normal state. Not a one shot deal like the older carbon ones.

 They got fancy with mounts  & attached them to the side of your house:

Use before the advent of Network Interfaces.
Use before the advent of Network Interfaces.

Then we come to the modern Network Interface Device, Telephone Network Interface, NID, NI, dmarc:

Modern NID

 

NID with Telco access opened.
NID with Telco access opened.

Check out http://catalog.corning.com/CableSystems/en-US/catalog/CategoryBrowser.aspx?cid=network_interface_devices_nids_web

 

What about businesses?  Do they just have 66 of these on the wall, one for each line?

Don’t be crazy,  they use a 66 block / M-Block / B-Block as a type of punchdown block to terminate the line.

Introduced in 1962, the term "66 block" simply reflects its Western Electric model number.
Introduced in 1962, the term “66 block” simply reflects its Western Electric model number.

They could also have a 110 block:

110 style blocks allow a much higher density of terminations in a given space than older style termination blocks
110 style blocks allow a much higher density of terminations in a given space than older style termination blocks.

 

 

http://pre-wire.tripod.com/interfaces_and_protectors.html

http://www.aflglobal.com/Products/Copper-Apparatus/Demarcation.aspx